Dresden 2017 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 32: Transport: Nanomechanics and Optomechanics (jointly with CPP, DY, BP, DF)
TT 32.3: Vortrag
Dienstag, 21. März 2017, 14:30–14:45, HSZ 201
Frequency tuning and coherent dynamics of two nano-string resonators in the strong coupling regime — Matthias Pernpeintner1,3, •Daniel Schwienbacher1,2,3, Philip Schmidt1,2,3, Rudolf Gross1,2,3, and Hans Huebl1,2,3 — 1Walther-Meißner-Institut, Bayerische Akademie der Wissenschaften, Germany — 2Physik-Department, Technische Universität München, Germany — 3Nanosystems Initiative Munich (NIM), Germany
Coupled nanomechanical resonators are prime examples for studying synchronization effects and nonlinear dynamics. Additionally, high-quality resonators are considered as building blocks for all-mechanical information processing platforms [1,2].This, however, requires the possibility to tune the relevant mode frequencies independently and to operate the resonators in the strong coupling regime. Here, we present a possible realization consisting of two high-quality (Q≈ 105) SiN nanostring resonators in the MHz regime, coupled mechanically by a shared support. We demonstrate that the fundamental mode frequencies of both nanostrings can be tuned independently by a strong drive tone resonant with one of the higher harmonic modes. We investigate the coherent dynamics of the two strongly-coupled nanostring resonators acting as an effective classical two-level system. We discuss the observation of classical Rabi oscillations and classical Landau-Zener dynamics indicating coherent and selective phonon transfer between two spatially separated mechanical resonators.
[1] Hatanaka et al., Appl. Phys. Lett. 102, 213102 (2013)
[2] Mahboob et al., Sci. Rep. 4, 4448 (2014).